Accident High Severity Stale

CHP : Traffic Collision on CA-4 Westbound exiting at Somersville Rd (Antioch). Off Ramp affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on November 3, 2026 at 7:40 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Nov 3, 11:40 AM

Last Updated

1 hour, 57 minutes ago

Nov 3, 11:45 AM

Coordinates

38.0035, -121.8355

Update History

1 observations

CHP : Traffic Collision on CA-4 Westbound exiting at Somersville Rd (Antioch). Off Ramp affected. Expect delays. Nov 3, 11:45 AM

Source: 511_sfbay · ID 511.org/1572383 First seen Nov 3, 2026 11:45 AM